How to loop through json data php

Question

I'm trying to loop through JSON data in php.

array:2 [
  "cart" => array:3 [
    0 => array:4 [
      "id" => 3
      "name" => "ying"
      "price" => "4000"
    ]
    1 => array:4 [
      "id" => 2
      "name" => "yang"
      "price" => "4000"
    ]
    2 => array:4 [
      "id" => 4
      "name" => "foo"
      "price" => "5000"
    ]
  ]
  "total" => 13000
]

I've used the json_decode function and a foreach over the data.

foreach (json_decode($arr) as $item) {
    $item['name'];
}

I want to be able to get each "cart" item and the single "total" data but I keep getting an illegal offset error when i try to call things like $item['name']

It's an array within an array. You are not accounting for that. — John Conde, Sep 10 '19 at 11:56

Rahul · Accepted Answer · 2019-09-10T12:30:35.550

0

As written in json_decode doc:

Note: When TRUE, returned objects will be converted into associative arrays.

If you dont pass 2nd argument as true then it will be treated as object as below.

$arr = json_decode($arr);
$names = [];
foreach ($arr->cart as $item) {
    $names[] = $item->name;
}
echo $arr->total;// this is how you will get total.

If you pass 2nd argument as true then it will be treated as associative array as below.

$names  = [];
$arr = json_decode($arr, true);
foreach ($arr['cart'] as $item) {
    $names[] = $item['name'];
}
echo $arr['total'];// this is how you will get total.

In your code, your data is having two main keys viz. cart and total. From which, you are trying to fetch the data of cart which I specified in my answer.

edited Sep 10 '19 at 12:30

answered Sep 10 '19 at 12:07

Rahul

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This works but it returns data from the first array only and i can't access 'total' – LDUBBS Sep 10 '19 at 12:24
You should point out that the data need is in the `cart` array and not the root of the decoded array. Your answer is correct but just lacks a complete explanation. – John Conde Sep 10 '19 at 12:24
Right John, i need to be able to get 'cart' data and total. – LDUBBS Sep 10 '19 at 12:26
I made changes in my answer. Please have a look. – Rahul Sep 10 '19 at 12:26
Thanks Rahul but i'm trying to fetch data for 'cart' and 'total' – LDUBBS Sep 10 '19 at 12:29
`$arr->total` if true not passed and `$arr['total']` if true passed. Once check my edit portion – Rahul Sep 10 '19 at 12:29
1

Works a treat. Thanks Rahul. – LDUBBS Sep 10 '19 at 12:34

How to loop through json data php

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